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Dissertation
Year: 1999
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More than half of the 800 species of European hoverflies belong to the Syrphinae subfamily. Adults feed on pollen and nectar collected in open corollae of numerous plants. Conversely, larvae of most Syrphinae species exploit a restricted number of prey, mainly aphids. These preys are usually well defended against predators. We assumed that syrphid-aphid relationships result from a long coevolution and that ecological and life-history traits of the former are constrained by those of the latter. The majority of Syrphinae species are forest dwellers and specialize on the exploitation of tree aphids. These preys are large, move quickly and live in small, scattered but long-lived colonies. Forest syrphids have a low fecundity but produce large eggs and neonate larvae which display high resistance to starvation, searching ability and capture efficiency. Conversely, Syrphinae communities encountered in farmlands are less diversified. They include polyphagous and plurivoltine species that fly over long distances and are widely distributed across the Palearctic region. These generalist and "vagrant" species are adapted to survive in ephemeral environments, where larval mortality is high and unpredictable. They produce a large number of small eggs and have voracious larvae that develop in a short period of time. These life-history traits allow them to have a strong numerical response to aphid densities and to be efficient biocontrol agents.
Syrphidae --- Syrphidae --- natural enemies --- natural enemies --- Aphididae --- Aphididae --- Biological competition --- Biological competition --- Biological control agents --- Biological control agents
Dissertation
Year: 1991
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Book
Year: 1996 Publisher: Jambes : Ministère de la Région Wallonne,
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Swamps --- Swamps --- design --- design --- Domestic gardens --- Domestic gardens --- amenity planting --- amenity planting --- Aquatic plants --- Aquatic plants --- Aquatic organisms --- Aquatic organisms
Article
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Humus --- Humus --- vegetation. --- vegetation --- forests --- forests --- Quercus --- Quercus --- Macroarthropode saprophage --- Belgium --- Belgium --- Macroarthropode saprophage
Book
Year: 1999 Publisher: Gembloux Faculté universitaire des sciences agronomiques de Gembloux
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Book
ISBN: 9782351911587 235191158X Year: 2016 Publisher: Bruxelles : Paris : Mardaga ; Gerfaut,
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La quatrième de couverture indique : "Alerte! Algues tueuses, plantes allergisantes, insectes ravageurs, pigeons contagieux, méduses géantes et autres espèces au tempérament envahissant défrayent de plus en plus souvent la chronique. Leurs proliférations sont difficilement maîtrisables et bouleversent les écosystèmes. Quel est le portrait-robot de ces super-espèces? À l'heure où tant d'autres espèces sont en voie d'extinction, quelles sont les clés de leur formidable succès? Quelles nuisances peuvent-elles provoquer sur le plan environnemental, économique ou sanitaire? À qui la faute? Pourquoi est-il si difficile de les maîtriser? Où en est la recherche de solutions durables et efficaces? Que pouvons-nous faire à notre échelle? Alors que l'Union européenne vient de mettre en application son tout premier règlement sur la prévention et la lutte contre les espèces exotiques envahissantes, cet ouvrage offre de nombreux repères pour mieux comprendre les invasions biologiques. Il suggère des solutions innovantes pour en réduire les dommages, mais aussi pour apprendre à vivre avec ce nouveau phénomène planétaire."
Animaux et plantes nuisibles. --- Plantes envahissantes. --- Insectes introduits. --- Biodiversité --- Conservation --- Invasive plants --- Introduced animals. --- Plantes envahissantes --- Animaux envahissants --- Biodiversity --- Biodiversity conservation --- Conservation of natural resources --- Biodiversité --- Conservation des ressources --- Animaux envahissants. --- Conservation des ressources.
Object
Year: 2001 Publisher: Gent Brussel : JNM Jeunes & Nature Instituut voor Natuurbehoud,
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Digital
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Book
Year: 2010 Publisher: Brussels Belgian Biodiversity Platform
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Article
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Domestic gardens --- Domestic gardens --- Aphidoidea --- Aphidoidea --- Pest insects --- Pest insects --- Biological control --- Biological control --- Biological control agents --- Biological control agents --- Coccinellidae --- Coccinellidae
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